Perform the operation indicated.
? 
A. 
B. 
C. 
D. 
Answer: A
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Four drivers called A, B, C, and D are entered in a race. According to the odds makers, the probability that the driver A will win the race is Pr(A) = 0.4, and the other three drivers all have an equal probability of winning the race.What is the probability that the driver B will not win the race?
A. 0.6 B. 0.4 C. 0.8 D. cannot be determined from the information given E. none of these
Solve the problem.A company has sales (measured in millions of dollars) of 50, 60, and 75 during the first three consecutive years. Find a quadratic function that fits these data, and use the result to predict the sales during the fourth year. Assume that the quadratic function is of the form y = ax2 + bx + c
A. y = 5x2 + 5x + 40; sales during the fourth year = $180 million
B. y = -5x2 + 40x + 15; sales during the fourth year = $95 million
C. y = 
x2 - 
x + 
; sales during the fourth year = $151.25 million
D. y = 
x2 + 
x + 45; sales during the fourth year = $95 million
Identify the base and the exponent for the exponential expression.-(-13)9
A. Base: 13, exponent: 9 B. Base: -13, exponent: 9 C. Base: 9, exponent: -13 D. Base: 9, exponent: 13
Write the fraction.According to a recent study, 10 out of 15 visits to a hospital emergency room were for an injury. What fraction of emergency room visits are NOT injury-related?
A. 
B. 
C. 
D. 